Size & Dimension
| Nominal Pipe Size | Size Code | A | HEX SIZE B | C** | Orifice Diameter |
|---|---|---|---|---|---|
| 3/8 | C | 2.16 | 13/16 | 3/8 NPT | 0.348 |
| 1/2 | D | 2.71 | 1-1 | 1/2 NPT | 0.464 |
| 3/4 | F | 2.95 | 1-1/4 | 3/4 NPT | 0.593 |
| 1 | H | 3.64 | 1-5/8 | 1 NPT | 0.890 |
| 1-1/4 | I | 3.91 | 2-1/4 | 1-1/4 NPT | 1.135 |
| 1-1/2 | J | 4.36 | 2-12 | 1-1/2 | 1.385 |
| 2 | K | 5.85 | 3 | 2 NPT | 1.555 |
| 2-1/2 | L | 5.50 | 3-3/4 | 2-1/2 NPT | 1.555 |
| 3 | M | 6.25 | 4-1/2 | 3 NPT | 2.025 |
| 4 | N | 7.13 | 5-1/2 | 4 NPT | 2.560 |
NOTES (DIMENSIONS TABLE)*May be larger and/or round.**Consult factory for ISO 7 "Rp" threads.
Available Materials
| * 316 Stainless Steel (SS) | * Alloy B (HB) |
| * Alloy 20 (A2) | * Alloy C-276 (HC) |
| * Brass (BR) | * Alloy 400 or MONEL® (MO) |
| * Carbon Steel (CS) | * Alloy 400 or MONEL® (MO) |
| * Titanium (TI) |
Pressure Temperature Table
| Body Material | Availability | Non-Shock Pressure-Temperature Rating | |
|---|---|---|---|
| 316 Stainless Steel (SS) Carbon Steel (CS) Brass (BR) | Standard | 3/8" - 3" 3000 PSIG @ 100°F (1500 PSIG for o-ring seats) | 4" 1500 PSIG @ 100°F |
| Alloy 20 (A2) Alloy C-276 (HC) Alloy 400 or MONEL®(MO) | Semi-standard | ||
| Alloy B (HB) Titanium (TI) | Contact the factory for these or other materials. |
Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.
Flow Data
PRESSURE DROP PSI
| Size | Cv |
|---|---|
| 3/8 | 1.9 |
| 1/2 | 4.3 |
| 3/4 | 7.2 |
| 1 | 14.6 |
| 1-1/4 | 28.8 |
| 1-1/2 | 31.9 |
| 2 | 42.0 |
| 2-1/2 | 50.0 |
| 3 | 89.0 |
| 4 | 140 |
FOR WATER AT 72°F
WATER FLOWRATE - GPM
Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.
Valve Weights
| SIZE | PART NUMBER | SS, CS & Alloys | BRASS |
|---|---|---|---|
| 3/8 | U3C | 3.0 oz. | 3.3 oz. |
| 1/2 | U3D | 8.5 oz. | 9.1 oz. |
| 3/4 | U3F | 9.6 oz. | 10.1 oz. |
| 1 | U3H | 1.2 lb. | 1.3 lb. |
| 1-1/4 | U3I | 2.9 lb. | 3.2 lb. |
| 1-1/2 | U3J | 3.6 lb. | 3.9 |
| 2 | U3K | 6.5 lb. | 7.2 lb. |
| 2-1/2 | U3L | 9.2 lb. | 10 lb. |
| 3 | U3M | 14.3 lb. | 15.5 lb. |
| 4 | U3N | 21.7 lb. | 23.9 lb. |
Seat & Cracking Pressure Options
| Valve Style | Size Range | Body Materials Other Options | Allowable Seat Materials Other Options | Standard Cracking Pressures. Other Options More Info. | Standard Spring Material More Info. |
|---|---|---|---|---|---|
| U3 | 3/8" -1-1/4" | 316 SS Brass | AFLAS® EPDM "Metal to Metal" PTFE Buna-N Kalrez® Neoprene Viton® | 1/8 PSI 1/2 PSI 1.5 PSI 3.5 PSI | 316 SS |
| U3 | 3/8" - 1-1/4" | C. Steel | AFLAS® Buna-N Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/8 PSI 1/2 PSI 1.5 PSI 3.5 PSI | 316 SS |
| U3 | 1-1/2" - 2" | 316SS Brass | AFLAS® Buna-N EPDM Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/8 PSI 1/2 PSI 1.5 PSI | 316 SS |
| U3 | 1-1/2" - 2" | C. Steel | AFLAS® Buna-N Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/8 PSI 1/2 PSI 1.5 PSI | 316 SS |
| U3 | 3/8" - 2" | Alloy 20 Alloy C-276 | AFLAS® Buna-N EPDM Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/2 PSI | Alloy C-276 |
| U3 | 3/8" - 2" | Alloy 400 or MONEL® | AFLAS® Buna-N EPDM Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/2 PSI | Alloy 400 or MONEL® |
| U3 | 3/8" - 2" | Alloy B | AFLAS® Buna-N EPDM Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/2 PSI | Alloy B |
